Electrical relay



May 3,1927.

R. M. GILSON ELECTRICAL RELAY Filed Nov. 29, 1922 4 Sheets-Sheet l 4 INVIIINTOR R w1..

May 3,1927. 1,627,322

R. M. GlLsoN ELECTRICAL RELAY med Nov. 2Q, 1922` 4 sheets-sheet 2 INVENTOR I BYQ',

/vw ATTORNEY May 3 1927.

R, M. GILSON ELECTRICAL RELAY Filed Nov. 29. 1922 4 Sheets-Sheet 3 INVENTOR #ulb ATTORNEY May 3,1927.

R. M. GlLSON ELECTRICAL RELAY 4 sheets-sheet 4 Filed Nov. 29. 1922 UIQ@ y, 1.

mvENTR ATTORNEY Referring to Figs.` l. 3 and 6, a contact spring bracket 33, of strip steel or other suitable material, has upstanding ends which are provided with pivot pins 35 mounted to swing in bearing screws 32N This lnacket is operated by means of the arm Ill pivotally connected to Vthe insulated link 230. .l U-shaped yoke 3st, Figs. Q, 3 and G, is riveted to the center ol the lowerI side ot this bracket; and the portion ol the bracket within its legs is cut out to provide clearance l'or the vane 17.

The contact bracket 33 is provided with a plurality ot' flexible contact members 3T (see Fig. (3) each ctnnprising a back spring BTB attached to the bracke 2523 by means olf insulating studs S50. A flexible contact finger 37C is riveted to each end ot the back spring. said contact lingers having silver tips 37 riveted thereto which engage with the lined contact member that. will be hereinafter described.

Each ot these movable contacts 2ST is connected to a binding post ll immediately above. said connection being made by means of a llexible copper conductor i558 attached to the screw head 3S.) on the under side ot' the top plate A.

The lixed contact post D or C with which the tienible cont-actors coact are provided (see Fig. T) with tips ol graphite itil). tastened to the spacer ett?, which in turn is con nected to the binding post -ll. The graphite contact tip -ltlD is clamped to a licrrule ltl which is in turn clan'iped to the spacer atl-. The screw l-l" ot the binding` post -tl has a square head stl-"g too large to turn in this spacer, and a nut al", to draw said spacer up tight against the seat ell. which bears on the top plate A. This nut tits into the recess l5 which is then lilled with sealing wax or some other suitable n'iaterial, the purpose being to prevent tampering with the binding post lrom outside the relay. A lock nut lll" and a washer 1E clamp down on the top and oilcr support lor the standard washers and nuts ot the binding post.

The segment gear 9 is a 900 segmenti, provided, as shown in Fig. 3, with metal clips 9A riveted to its edge andabutting against stops l5 and 1G which limit the motion ol' the gear. The shock caused by the sudden arresting of the motion ot this gear is absorbed by the clutch mechanism hereinbefore mentioned and which I will now describe.

A brass disk 2l is riveted to the sha'lt 27. Another and smaller disk QG, having a hole in its edge for the end of a coil spring Q5, is also riveted to the shai't. The pin gear, which is of the squirrel cage type, comprises a. hub of metal, preferably brass, and two flanges 23 integral therewith which carry around their peripheries a plurality of steel pins 20A equally spaced. These pins or teeth are preferably polished stainless or non-corrodible steel rods about yt, in dialnet.` and are 'tree to rotate in the supporting cage, thus taking up some oi the sliding ii'riction between the gear `segment; teeth and the pinion and allowing new surfaces to come into contact. The gear is interposed between two liber lfriction washers 12,2, and the combination o'lE said gear and said washers is supported upon the shaitt 2i', tree to rotate, but held in close contact with the lixcd disk Ll by the pressure ot the spring 25 agaimat another tl'.ik 2l having two pins 2o between which the end ol the said spring is heid tast. Thus the shock ot the impact o'lthe gear t) against the stop l5 or the stop lo is absorbed either in 'Friction on the liber disks, or by torsion ot the spring, o i' by both, and so the pivots and other small parts are protected trom undue stain. The material and dimensions of the said spring are such as to give positive motion oit the pinion Linder steady torque exerted by the shatt, or vice versa, within the limits ol the motion oil' the segment gear. ll'hen the relay is energized the. sha'lt 2T tends to rotate in a clockwise direction. as shown in liig. Reference to liig. 2 will show that this motion tends to uncoil the spring 25, thereby increasing the pressure on the lriction disks 22 and thus in suring positive rotation olv the pinion. On the other hand, when the relay is de-ener gized and the segment gear strikes the stop as hereinafter explained, the, inertia olf the vane and other moving parts tends to wind up the coil spriiig, thus reducing the pressure on the Vlriction disks and hence allowing; the clutch mechanism to slip more re*L lily. U

lt will be noted that as shown in Fig. l the spring contact support. 33 is grounded to the traine l5 of the relay, by a l'lexible copper conductor 33 to avoid lrcczing ol the relay in the energized position due to heavy discharge of lightning through the pivots and bearing screws.

ln the torni olf my invention described herein I have incorporated breather holes li in the bottoni plate l (see Fig. 2), fitted with small mesh metal gauze. 'lhese breather holes allow free circulation of air but prevent the entrance of insects, dirt or other foreign mattei'.

In the accompanying drawings all parts are shown in the positions corresponding to the ile-energized condition ot the motordevice ol the relay. lVhen alternating current ol the proper value passes through the windings 29, the vane 1T is caused by induction motor action to rotate in clockwise direction, as viewed in Fig. 3, causing the pinion 2O to drive the segment gear t) in counter clockwise direction. This motion, communicated to the contact bracket, opens the back contact- C and closes the liront contacts D. The remainder of the motion, until Uil llt)

lil

the segment gear clip 9^ strikes the stop 16, causes the front contact tip to slide upon the lined contact. member i0.

As long; as the windings ot the motor device :1re energized the contacts :1re held in this position against the torql'le exerted by the counter weights ll. Vhen the motor device is ile-energized, these Weights uct to return the segment gear into its originel posiytion. About midvvey of its motion Athe iront eontect li) opens, und soon utter the beck Contact C closes, The segment rear continues to more downward, under the propulsion ot the weights ll, till. the clip 9A strikes the stop lil lleceuse o'l the inertie` ot the mining parts und the con'ipuretively large distance the segment must move before the f fontacts reverse, ii considerable interval ot time elepses fier de-energi'lnition before the Contact operation occurs. The duration oi this time may be regulated by the size oit the Weights il, und by their distance from the center oiI vthe slmtt which may be varied by screwing them up or down on the rod l0,

A modification in the method o'l commumeeting the motion oit 'the motor device to the Contact bracket is shown in l. ln piece oiI the rigid erm 3l, l provide :L ilexible spring member i3 stime-d to the top oi' the bracket fill, und having; en eye it) toi-med in its end whereby it is pivotnlly :attz'iched to the insulated liul; 3l). A stitl' member or beck spring;` el? is attached to 'the under side i" ot' the bracket 32h und in the position corresponding to the dii-energized condition of the motor device, rests against the spring member liti. An outstanding,l lugI l, provided on the relay trame, :ind it screw 52 is udjustubly mounted in this l ug end is held in permanent adjustment by a lock nut 50.

The operation of this combination is as iollows: 'When the motor device is energized its motion es previously described serves to move the link 30, upward. This .motion is communicated by the spring` i8 to the bracket which moves aboutI its pivots till the bock contacts open end the 'front contacts close, whereupon the yoke ."ei engages the screw 52, 1which prevents further movement. The spring` 4S absorbs any tmfther move ment oit the link 2l() in ilenure, thus relieving the Contact linger 37 oi excessive pressure. The stitl biol: spring 4:7 is provided to prevent liexure oi? member 48 when in de-energized positionby engaging said member near the eye Li9 end vthus insuring` good pressure at the bzicl contact D.

Although l have herein shown and de` scribed only one Yform ot relay embodying my linvention and one modification thereof, it is understood that Various clutnges :1nd modifications muy be mede therein Within the scope oli the appended claims Without departing from `the spirit and scope of my invention.

lleving thus described my invention, What I claim is:

A relziy comprising` e metal trame, a top plate oi? insulating` materiel, e metal contactopereting ber pivotelly supported 'from said top plete, e, motor lMid redliiction gearing supported by seid trame, s connection between seid gearing and seid ber including e link mede up oi 'two parte electrically insulated from each other, and :in electrical connection :troni seid bei.' to seid metal treme.

In testimony Whereol' I uliix my signature ROBERT M GILSON.

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